/*-
 * SelectSMSMode.java
 *
 * $LastChangedBy:  $
 * $LastChangedRevision:  $
 * $LastChangedDate:  $
 * $HeadURL: $
 *
 * Copyright (c) 2008, Stein Gunnar Bakkeby
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Stein Gunnar Bakkeby nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.googlecode.attention.at;

import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class SelectSMSMode extends AtCommand<SelectSMSMode> {

  private Mode currentMode;
  private Mode[] supportedModes;
  
  public enum Mode {
    PDU(0),
    TEXT(1);
    
    private final int value;
    private Mode(final int value) {
      this.value = value;
    }
    
    public int getValue() {
      return value;
    }
    
    public static Mode getMode(final int value) {
      return (value == 1 ? TEXT : PDU);
    }
    
    public static Mode getMode(final char value) {
      return (value == '1' ? TEXT : PDU);
    }
  }
  
  public SelectSMSMode(AtListener<SelectSMSMode> listener) {
    super(listener);
  }

  @Override
  protected SelectSMSMode getThis() {
    return this;
  }
  
  /**
   * This will grab and indicate the supported statuses for the current phone.
   * 
   * @see #getSupportedModes()
   */
  public void prepareTest() {
    setCommand("AT+CMGF=?", Command.TEST);
  }
  
  /**
   * This will find out the current mode.
   * 
   * @see #getCurrentMode()
   */
  public void prepareRead() {
    setCommand("AT+CMGF?", Command.READ);
  }
  
  public void prepareWrite(final Mode mode) {
// Unsure whether to care...
//    if (supportedModes != null) {
//      boolean supported = false;
//      for (Mode supportedMode : supportedModes) {
//        if (mode == supportedMode) {
//          supported = true;
//        }
//      }
//      if (!supported) {
//        throw new IllegalArgumentException("Unsupported Mode: " + mode);
//      }
//    }
    setCommand("AT+CMGF=" + mode.getValue(), Command.WRITE);
  }
  
  protected void parseTest(final String response) {
    /*
     * Regex for AT+CMGF=?:
     * \+CMGF: \((\d)[-,]?(\d)?\)
     * 
     * (Some phones only support one mode, thus the second option can be null)
     * Group(0) = +CMGF: (0)
     * Group(1) = 0
     * Group(2) = null
     * 
     * Group(0) = +CMGF: (0,1)
     * Group(1) = 0
     * Group(2) = 1
     */
    final Pattern pattern = Pattern.compile("\\+CMGF: \\((\\d)[-,]?(\\d)?\\)");
    final Matcher matcher = pattern.matcher(response);
    if (matcher.find()) {
      if (matcher.group(2) == null) {
        supportedModes = new Mode[1];
        supportedModes[0] = Mode.getMode(matcher.group(1).charAt(0));  
      } else {
        supportedModes = new Mode[2];
        supportedModes[0] = Mode.getMode(matcher.group(1).charAt(0));
        supportedModes[1] = Mode.getMode(matcher.group(1).charAt(1));
      }
    }
  }
  
  protected void parseRead(final String response) {
    /*
     * Regex for AT+CMGF=?:
     * 
     * 
     * Group(0) = +CMGF: 0
     * Group(1) = 0
     */
    final Pattern pattern = Pattern.compile("\\+CMGF: (\\d)");
    final Matcher matcher = pattern.matcher(response);
    if (matcher.find()) {
      currentMode = Mode.getMode(matcher.group(1).charAt(0));
    }
  }
  
  /**
   * This will return the supported modes, or null if information not gathered
   * by successfully sending a test command.
   * 
   * @return Array of modes, or null if used out of context
   */
  public Mode[] getSupportedModes() {
    return supportedModes;
  }
  
  /**
   * This will return the current SMS mode, or null if information not gathered
   * by successfully sending a read command.
   * 
   * @return The current mode (PDU or TEXT), or null if used out of context
   * @see #prepareRead()
   */
  public Mode getCurrentMode() {
    return currentMode;
  }
}
